Five years after Hurricane Katrina slammed into Louisiana, leaving much of New Orleans underwater, the Insurance Information Institute, an industry-funded group, has put out a white paper detailing statistics from the disaster.

Some of the findings:

Private-sector insurers paid out more than $41 billion on 1.7 million auto-, home- and business insurance claims, making Katrina "the costliest disaster in the history of the global insurance industry."

The federal government's National Flood Insurance Program paid out an additional $16.1 billion in claims, "a dollar amount higher than what the NFIP paid to all of its claimants combined between 1968 and 2004."

The report also details the outcome of post-storm lawsuits aiming to define what damage was caused by wind and what was caused by water -- a key factor in determining whether homeowner's insurance pays for damage. From the report:

"Ultimately, insurers won virtually every major case that was filed against them post-Katrina, establishing or reaffirming important legal precedent in each instance."